This fabulous standard size knockout box is constructed of durable 18-8 stainless steel and it sits inside a heavy non-slip rubber base. The removable rubber-coated bar provides the perfect surface for knocking out spent coffee. It provides a convenient, no fuss, no mess way to safely dispose of your coffee grinds. Measures 4.5-inches by 4.75-inches by 6.25-inches tall. The box itself is dishwasher safe.